Honda Civic 1998 Service Manual page 1102

Five-step Troubleshooting
1 .
2 .
J .
Verify The Complaint
Turn on all the components in the problem circuit to
verify the customer complaint. Note the symptoms
Do not begin disassembly or testing until you have
narrowed down the problem area.
Analyze The Schematic
L o o k u p t h e s c h e m a t i c f o r t h e p r o b l e m c i r c u i t .
Determine how the circuit is supposed to work by
t r a c i n g t h e c u r r e n t p a t h s f r o m t h e p o w e r f e e d
through the circuit components to ground. lf several
circuits fail at the same time, the fuse or ground is a
likely cause.
Based on the symptoms and your understanding of
the circuit operation, identify one or more possible
causes of the problem.
lsolate The Problem By Testing The Circuit
Make circuit tests to check the diagnosis you made
in step 2. Keep in mind that a logical, simple proce-
dure is the key to efficient troubleshooting. Test for
the most likely cause of failure first. Try to make
tests at points that are easily accessible.
Fix The Problem
Once the specific problem is identified, make the
repair. Be sure to use proper tools and sale proce-
oures.
Make Sure The Circuit Works
Turn on all components in the repaired circuit in all
modes to make sure you've fixed the entire prob-
lem. lf the problem was a blown fuse, be sure to
test all of the circuits on the fuse. Make sure no new
problems turn up and the original problem does not
recur,
Wire Color Codes
The following abbreviations are used to identify wire
colors in the circuit schematics:
W H T . . . . . . . . . . . . . . . . . . . . . . , . . . . . .
W h i t e
Y E L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Y e l l o w
B L K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B l a c k
B L U . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1 u e
G R N . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G r e e n
R E D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R e d
O R N . . . . . . . . . . . . , . , . . . . . . . . . . . . . . O r a n g e
P N K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
P i n k
B R N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B r o w n
G R Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G r a y
P U R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P u r p l e
L T B L U . , . . . . . . . . . . . . . . . . . . . . , . .
L i g h t B l u e
L T G R N . . . . . . . . . . . . . . , . . . . . . . . . L i g h t G r e e n
T h e w i r e i n s u l a t i o n h a s o n e c o l o r o r o n e c o l o r w i t h
another color stripe. The second color is the stripe.
WHT/ALK
23-5